Year	Percent
1950	14.68167
1955	15.69998
1960	14.40529
1965	15.09877
1970	14.97983
1975	14.05924
1980	11.68454
1985	11.32278
1990	13.64636
1995	14.51925
2000	13.52276
2005	12.89068
2010	12.85919
2015	11.73581
2020	10.77864
2025	10.22484
2030	9.9235
2035	9.62742
2040	9.24997
2045	8.78609
2050	8.31998
2055	7.92885
2060	7.63584
2065	7.3968
2070	7.14023
2075	6.85266
2080	6.55764
2085	6.29532
2090	6.06525
2095	5.8799
2100	5.71714